How can I know which deb-multimedia packages I have installed?

[Csanyi Pal <csanyipal@gmail.com>]

Hi,

I have installed vuze on my Debian GNU/Linux 7.0 (wheezy) system.

My sources.list is:

deb-src http://ftp.debian.org/debian/ sid main contrib non-free
deb http://ftp.debian.org/debian/ sid main contrib non-free

deb-src http://ftp.debian.org/debian/ testing main contrib non-free
deb http://ftp.debian.org/debian/ testing main contrib non-free

deb-src http://ftp.debian.org/debian/ experimental main contrib non-free
deb http://ftp.debian.org/debian/ experimental main contrib non-free

deb http://www.deb-multimedia.org sid main
deb http://www.deb-multimedia.org testing main

# Bitlbee
deb http://code.bitlbee.org/debian/devel/testing/amd64/ ./

# GNUstep
deb http://coyote.octets.fr/pub/gnustep/packages/wheezy/amd64/ ./

# Scribus
deb http://debian.scribus.net/debian/ unstable main

deb http://http.us.debian.org/debian/ wheezy contrib non-free main

I have installed vuze but I can't to use it. I reported a bug here:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=%23700090

I want to follow advice of Michael Gilbert:

"You have a mix of deb-multimedia packages, which often leads to
problems.  Please try to reproduce this on a clean installation."

So I change my sources.list:

deb http://www.deb-multimedia.org sid main
#deb http://www.deb-multimedia.org testing main

and did aptitude update and upgrade.

Mike sed: "You should remove all packages that you've installed from
either." 

So how can I know now which debian packages are installed from these
deb-multimedia repositories abowe?

-- 
Regards from Pal